Don't set up Ruby again

Author: neilvcarvalho

action.yml

@@ -40,12 +40,6 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        bundler-cache: false
-        working-directory: ${{ github.action_path }}
-
     - name: Run importmap-update
       shell: bash
       working-directory: ${{ github.action_path }}